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COMMUNICATION PROTOCOLS
J1587 Outputs - Single Byte Parameters
PID 33 - Clutch Cylinder Position
update rate:
On Request
format:
PID
33
PID 40 - Engine Retarder Switches Status
update rate:
0.2 s or on state change
format:
PID
40
6-6
Data
a
a – Clutch Cylinder Position
Data
a
a – Engine Retarder Switches Status
Bits 8–7:
Reserved – all bits set to 1
Bits 6–3::
Engine Retarder Level Switch
0 - 0 Cylinders
1 - 2 Cylinders
3 - 3 Cylinders
4 - 4 Cylinders
5 - 5 Cylinders
6 - 6 Cylinders
7 - 7 Cylinders
8 - 8 Cylinders
9 - 13 – Reserved
14 – Error
15 – Not Available
Bits 2–1:
Engine Retarder Switch
00 - Off
01 - On
10 - Error
11 - Not Available
7SA827 0701 Copyright © 2007 DETROIT DIESEL CORPORATION
All information subject to change without notice. (Rev. 01/07)
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